1. Department of Gastroenterology and Hepatology Amsterdam UMC University of Amsterdam Amsterdam The Netherlands
2. Department of Gastroenterology and Hepatology Flevohospital Almere The Netherlands
3. Department of Gastroenterology and Hepatology OLVG Oost Amsterdam The Netherlands
4. Department of Gastroenterology and Hepatology Spaarne Hospital Hoofddorp The Netherlands
5. Department of Gastroenterology and Hepatology Nothwest Clinics Alkmaar The Netherlands
6. Department of Internal Medicine Tergooi Hospitals Hilversum The Netherlands
7. Department of Gastroenterology and Hepatology OLVG West Amsterdam The Netherlands
8. Department of Pathology Amsterdam UMC University of Amsterdam Amsterdam The Netherlands